Utility model content
Main purpose of the present utility model is to provide a kind of electric toothbrush, including brush and its driveDynamic component, forms a recess, described ph detector one end on the shell of electric toothbrush main bodyWith being housed in this recess of housing hinge；
One ph probe is had on described ph detector；
Discharge circuit, is electrically connected with described ph probe, is used for providing it high resistant working environment；
Main control unit, is connected with the output end of described discharge circuit.
By upper, the detection for cavity interior acid-base value is realized by ph detector, for judgingThe health status of human body provides reference.
Optionally, described discharge circuit includes the first discharge circuit and the second discharge circuit, respectivelyIt is connected with two data collection terminal mouths of ph probe.
Because ph probe comprises reference electrode port and indicator electrode port, therefore adopt two gradesDischarge circuit is connected with two-port respectively, provides high resistant working environment for it, thus strengthening anti-dryDisturb ability, it is to avoid other electric signals produce impact to it.
Optionally, described first discharge circuit includes the circuit of model tlv221 chip, itsThe reference electrode port that positive input mouth is popped one's head in described ph is connected, reverse input end mouth withOutput port connects, as the output end of the first discharge circuit.
Optionally, the second discharge circuit includes the circuit of model tlv22541 chip, and itIndicator electrode after one reverse input end mouth is connected with the first output port, with described ph probePort connects；
Second positive input mouth is connected with the output end of the first discharge circuit；
After its second reverse port is connected with the second output port, as the output end of the second amplifierIt is connected with described main control unit.
Optionally, the first positive input mouth ground connection of described second discharge circuit, right to realizeThe boosting of output data is processed, for the voltage increase of -500mv～500mv that will be received extremelyThe voltage of the discernible -500mv～657mv of described main control unit.
By upper, connected by the circuit of virtual earth, so that the current potential to indicator electrode and reference electrodeDifference carries out boosting process, so that the master chip in main control unit can read.
Optionally, in described first discharge circuit and the second discharge circuit, pop one's head in ph respectivelyThe circuit that connects of two data collection terminal mouths on, be additionally provided with filter circuit.
Optionally, it is provided with the housing and rotate the base being connected and this base interval with itThe shift knob of setting, is provided with a magnet in the bottom of described shift knob, on the housingOne Hall switch is set, described Hall is triggered by the alignment of this Hall switch and described magnetSwitch and send electric signal to the control unit of described electric toothbrush.
Using said structure, when described ph sensor is opened, described shift knob moves forward,Magnet is made to misplace with Hall switch, thus producing potential difference, then Hall switch will be to electronicThe main control unit of toothbrush is sent one and is started corresponding electric signal with ph sensor；Ph sensesWhen device cuts out, described shift knob is moved rearwards by, and so that magnet is aligned with Hall switch, then HallSwitch cuts out corresponding electricity by sending one to the main control unit of electric toothbrush with ph sensorSignal.
Specific embodiment
Referring to Fig. 1～Figure 17, electric toothbrush described in the utility model is described in detail.
As shown in FIG. 1 to 3, electric toothbrush generally includes brush holder 1 and the brush of split type setting2.Brush holder 1 has a housing 11, is provided with axially arranged along brush holder 1 in this housing 11Main body rack 12, is integrally formed multiple lattices on this main body rack 12, by this multiple pointsEvery portion, the space that housing 11 is surrounded is divided into install the battery case 111 of battery and usesTo receive the driving means of dress brush 2 cavity 112 for this driving means offer activity space.In contrast to the side of battery case 111 and cavity 112, electric tooth is installed in main body rack 12The circuit main board 14 of brush, is provided with the main control unit 711 of electric toothbrush in described circuit main board 14,And the connected drive part of difference, pressure detecting part, ph detection part, switchCircuit and communication unit grade, and physical circuit will be described in detail later.In aforementioned battery case 111Inside it is packaged with the supply line electrically connecting with this circuit main board 14；In housing 11 away from brush2 end is provided with the charging base 113 in order to be charged for the battery in battery case 111.The lower surface of housing 11 is provided with to control on/off state and the work of electric toothbrushThe multiple buttons 114 of pattern form described on-off circuit 715, this multiple buttons 114 and circuitOn mainboard 14, the button of setting corresponds.
In the present embodiment, drive part includes electric-motor drive unit 720, and connectedMicroseism motor 13 is constituted.As shown in figure 8, described electric-motor drive unit 720 adopts includes typeNumber for drv8xxx series motor drive ic realize, the signal input port of this chip(nsleep, in1, in2) is connected with described main control unit 711, output port (out1,Out2) connect described microseism motor 13, two interfaces of in figure j6, j7 as know in motor by force13 interface, electric-motor drive unit 720 is used for driving according to the control instruction of main control unit 711Microseism motor 13 works, and described control instruction includes rotary speed instruction and dormancy instruction.Micro- at thisThe both sides up and down of seismoelectric machine 13 are separately installed with is paralleled with the both sides up and down of microseism motor 13Metal framework 131.Fix one in the front end (i.e. near one end of brush 2) of main body rack 12Support shaft 121, this support shaft 121 and the length direction through brush holder 1 and its above-below direction institutePlane perpendicular (i.e. support shaft 121 along Fig. 3 shown in left and right directions setting).AforementionedMetal framework 131 is rotated with this support shaft 121 and is connected, and makes to be fixed on this metal framework 131Microseism motor 13 can with respect to main body rack 12 produce small angle range in rotation.LeadingThe front end of body support frame 12 is close to support shaft 121 and is fixed with sealing block 122, microseism motor 13Power transmission shaft 132 sequentially pass through sealing block 122, housing 11 from this housing along its length11 front side is stretched out, and brush 2 is generally inserted on the aforementioned extension of power transmission shaft 132.?The front side of housing 11 generally offers the hole stretched out for power transmission shaft 132, and sealing block 122 is mainIn order to seal to this hole, prevent electric toothbrush from intaking in use and lead to microseism motor13 damages.Can be seen that microseism motor in conjunction with aforementioned structure description with reference to Fig. 3 and Fig. 413 define the lever construction with support shaft 121 as fulcrum with brush 2.
Main body rack 12 is provided with one near its rear end in abovementioned cavity 112 opening upStopper slot 123, in this stopper slot 123 receive fill a spring 124.As Fig. 3 and Fig. 4 instituteShow, metal framework 131 is mainly made up of two opposite u shape frameworks of opening, at this twoIt is integrally formed the length direction along brush holder 1 at the open rearward end of u shape framework respectively to extend backwards simultaneouslyIt is close to the connecting portion 131a being set together, in order to convenience described below is by the u positioned at downsideShape metal framework is defined as lower metal framework 131b.Connecting portion 131a rear end (i.e. away fromThe side of brush 2) the overall limiting section 133 being in the form of a column and arranging down of setting one, in this limitThe bottom in position portion 133 is integrally formed a flange 133a and is located at below this flange 133a and along itThe raised 133b axially extending down.The bottom of limiting section 133 is stretched in stopper slot 123, itsIn, flange 133a is placed in stopper slot 123 and is abutted against with spring 124, and raised 133b stretchesEnter in spring 124.When metal framework 131 is moved upwardly by under microseism motor 13 drive, whenWhen flange 133a is locked at the opening of stopper slot 123, metal framework 131 stops moving up.Position limit device described in the utility model is constituted by aforementioned stopper slot 123 and limiting section 133, bySpring 124 constitutes lower caging device described in the utility model, and this spring 124 mainly has as followsEffect: first, the downward range of motion of limiting section 133 can be limited as lower caging device,And then limiting section 133 is limited in the reasonable scope；Second, when user applies to brush 2During different pressures, according to lever principle, limiting section 133 will move downwardly to diverse location, thenSpring 124 will apply a restoring force it can be ensured that limiting section 133 is each to this limiting section 133Can smoothly be reset at following defined dead-center positions, so, it is possible to ensure metal frameThe mobile route of frame 131, makes the displacement of limiting section 133 and user's pressure applied be formedOne linear relationship；3rd, adjust brush 2 and be placed in the rubber by brush during following dead-center positionCircle is applied to the deformation power of the lever construction being made up of microseism motor, makes aforesaid lever structureIt is in stress balance position.
In addition, the rear upper side in abovementioned cavity 112 arranges a plane on main body rack 12Portion 125, this planar portions 125 and aforementioned stopper slot 123 just to setting, by this planar portions 125Constitute metal framework stopping means described in the utility model.In the utility model, such as Fig. 3 andShown in Fig. 4, metal framework 131, the microseism motor 13 being arranged on this metal framework 131And aforementioned limiting section 133 is common and brush 2 defines the lever with support shaft 121 as fulcrumStructure, when brush 2 up/down is mobile, according to lever principle, metal framework 131, peaceBe contained in microseism motor 13 on this metal framework 131 and aforementioned limiting section 133 then downwards/toUpper movement.In the utility model by electric toothbrush be in metal framework 131 during unused state,It is arranged on residing for microseism motor 13 and the aforementioned limiting section 133 on this metal framework 131Physical slot is defined as dead-center position, when brush 2 is in this dead-center position, metal framework 131To pop up under the effect of spring 124 deformation force, aforesaid plane portion 125 can stop metalFramework 131 is excessively mobile upward, so that metal framework 131 is protected by the restriction of this planar portions 125Hold in dead-center position.
In the utility model, pressure detecting part be used for above-mentioned metal framework 131b with respect toThe displacement of inductance coil 719 is detected, to determine brush dynamics.Pressure detecting portionThe specific embodiment divided is as follows: is provided with inductor wire as shown in Figure 7 on circuit main board 14Circle 719 and connected induced electricity inductance value digital quantizer 718, wherein, inductance coil719 on circuit main board 14 and with aforementioned lower metal framework 131b positioned at microseism motor 13Lower section partly just to setting, a diameter of 0.3mm of inductance coil 719, the number of turn is 40.LogicalCross the experimental data in the design phase to show, when the inductance coil using above-mentioned diameter and the number of turnWhen 719, the data of its collection is most sensitive, and data variation amount is maximum.Table 1 institute specific as followsShow, transverse axis represents brush dynamics, ordinate represents five kinds of brushing mode.
Table 1
As shown in Fig. 3～Fig. 5, main body rack 12 offer relative with inductance coil 719The through hole 126 put, this through hole 126 is mainly inductance coil 719 and is stepped down, it is to avoid lower goldInduced signal between genus framework 131b and inductance coil 719 is blocked and disturbs, and then reallyProtect the Detection results of inductance sensor.In the utility model, it is made up of lower metal framework 131bMetallic conductor, inductance coil 719 mainly senses the change in displacement institute because of lower metal framework 131bThe numerical value change of the inductive sensor causing, sets near downside because inductance coil 719 is used for detectingAt the change in displacement of lower metal framework 131b put rather than limiting section 133 or connecting portion 131aChange in displacement, can shorten the displacement range that inductance coil 719 is detected, so can reduceParameter (including the number of turn and the number of plies) to inductance coil 719 requires, and then inductance needed for reductionThe size of coil 719.Lower metal framework 131b microseism motor 13 drive lower edge close/away fromIn the direction reciprocating movement of inductance coil 719, this lower metal framework 131b and inductor wireCircle the distance between 719 changes, because both the distance between change will be in electricityThe numerical value change of inductive sensor is produced on sense coil 719, this numerical value change passes through induced electricity inductance valueAfter digital quantizer 718 is identified conversion, send to main control unit 711, main control unit 711As different detected values, received data to be reflected that electric toothbrush user is applied to brush 2Pressure, and then reflect brush dynamics size.As shown in figure 9, described induced electricity inductance value numeralConverter 718 adopts the chip of model ldc1000 to realize,
Realize brush is applied to for electric toothbrush user using inductance sensor in the present embodimentThe detection of 2 pressure, in addition, may also be employed other modes.For example inductance sensor is replacedFor infrared sensor, infrared ray is launched by infrared sensor, according to infrared ray by lower metal frameThe infra-red intensity of frame 131b reflection judges distance, thus realizing the detection of brush dynamics.When using infrared sensor, it is not limited to metal framework, any can hinder infrared rayMaterial is all achievable.
Or, also can be realized using capacitance sensor, for example, inductance coil 719 be replaced withCapacitance sensor fixed polar plate, lower metal framework 131b is replaced with capacitance sensor activity polePlate.Two pieces of pole plate common electrical connection one signal processing chips, when the relative position of two-plate occursDuring change, its interelectrode capacity changes and forms differential capacitor, and signal processing chip detectsThis capacitance variations and the voltage change that leads to, thus detect distance therebetween.
As shown in figure 3, a recess is formed on the upper surface of housing 11, join in this recessIt is equipped with ph detection part.As shown in Figure 3 and Figure 6, ph detection part includes being arranged on recessPh that the base 115 of front end and this base 115 are detachably connected probe 712, be arranged on recessedOne shift knob 116 of portion rear end and this shift knob 116 are formed at the switch execution of onePortion 117.Wherein, base 115 is rotated with housing 11 by rotating shaft 115a and is connected；Ph pops one's head inThe 712 overall strips in the length direction setting along brush holder 1, its front end is tied by plugStructure is formed with base 115 and is detachably connected, and its rear end is abutted against with shift knob 116.BottomThe appearance of seat 115, ph probe 712 and shift knob 116 is identical with housing 11.
The locating slot that side is in approximately the shape of falling u is formed respectively on the left and right sides of base 115118, the switch enforcement division 117 also overall strip in the length direction setting along brush holder 1,It is symmetrically formed a pair linking arm towards front upper place projection in the front end of this switch enforcement division 117119, the front end of this pair of linking arm 119 is placed in aforementioned a pair of locating slot 118 and both shapesBecome to rotate and connect.A pair first screens and second are also symmetrically formed on the left and right sides wall of recessScreens, and both are along the orientated lengthwise setting of brush holder 1, wherein, the first screens is located at theTwo screens rears, the position of the first screens corresponding ph probe 712 closure, the second screens corresponds toPh probe 712 open positions.Being integrally formed in the left and right sides of switch enforcement division 117 canThe fitting portion mutually chimeric with aforementioned first screens and the second screens.When opening ph probe 712,Pull switch button 116 makes switch enforcement division 117 move forward to user forward, until aforementionedFitting portion embeds in the second screens, and in this process, linking arm 119 promotes base 115 and makesIt is rotated up around rotating shaft 115a, makes ph probe 712 by jack-up and be rotated up opening.When closing ph probe 712, user pulls back shift knob 116, makes switch enforcement division117 are moved rearwards by, until aforementioned fitting portion embeds in the first screens, in this process, connectArm 119 pulls base 115 and so that it is rotated down around rotating shaft 115a, makes ph probe 712Rotate down, until the rear end of ph probe 712 is contacted with shift knob 116 and is connected toTogether.
In addition, being additionally provided with a pair of contact 115b in the front end of base 115, in Fig. 3 and Fig. 5 instituteShow that sealing block 122 is provided with the supporting contact of a pair matching with this pair of contact 115b, thisA pair supporting contact is electrically connected with aforementioned circuit mainboard 14.In the bottom of shift knob 116 alsoBe provided with a magnet, in aforementioned recess in this magnet just to place encapsulation one Hall switch.phWhen probe 712 is opened, shift knob 116 moves forward, and makes to be fixed on shift knob 116 bottomThe magnet in portion and Hall switch misplace, thus producing potential difference, then Hall switch will be to electricityThe main control unit 711 of dynamic toothbrush sends one and starts corresponding electric signal with ph probe 712.When ph probe 712 fully open when, ph pop one's head in 712 front ends a pair of contact 115b with closeSupporting contact electrical connection on envelope block 122, then ph probe 712 and circuit main board 14 form electricityConnect.Conversely, when ph probe 712 is closed, the electricity of ph probe 712 and circuit main board 14Connect and disconnect；Meanwhile, shift knob 116 is moved rearwards by, and makes to be fixed on shift knob 116 bottomThe magnet in portion is aligned with Hall switch, then Hall switch is by the main control unit 711 to electric toothbrushSend one and close corresponding electric signal with ph probe 712.
Figure 10 show the circuit diagram of ph detection part in the present embodiment.Including be sequentially connectedPh probe 712, amplifier unit 713 and boosting unit 714.
In the present embodiment, described ph probe 712 includes an indicator electrode port and reference electricityExtreme mouth.Its dead-center position of indicator electrode port be in ph7, its electrode potential and saliva fromSub- activity is linear, thus detecting intraoral acid-base value.
Based on this, amplifier unit 713 includes the first discharge circuit and the second discharge circuit, respectivelyIt is connected with a port of ph probe, two ports for popping one's head in ph provide high balk ringBorder, constitutes double high impedance input circuits.Because ph probe internal resistance is very high, therefore it is required that front storingBig device has higher input impedance, thus strengthening antijamming capability, it is to avoid other electric signals pairIt produces impact.
Specifically, the first discharge circuit includes the circuit of model tlv221 chip, and it is positiveThe reference electrode port that input port in+ is popped one's head in described ph is connected, reverse input end mouth in-After being connected with output port out, export reference electrode data as output end.
Second discharge circuit includes the circuit of model tlv22541 chip, and it is first reversely defeatedInstruction electricity after inbound port 3in- is connected with the first output port 3out, with described ph probeExtreme mouth connects,
Second positive input mouth 1in+ is connected with the output end of the first discharge circuit, receives referenceElectrode data.
In the present embodiment circuit, in two ports of first, second discharge circuit and ph probeOn the circuit connecting, it is additionally provided with the electric capacity for filtering.
Tlv22541 chip calculates the potential difference of indicator electrode and reference electrode, that is, represent mouthChamber soda acid degrees of data, is exported to main control unit 711 by output port, that is, described in Figure 10Second reverse input end mouth 1in- of tlv22541 chip is connected with the second output port outAfterwards, as output end, the potential difference of output indication electrode and reference electrode, represent oral cavity soda acidThe data of degree is to main control unit 711.
Further, because the voltage range that ph probe 712 is gathered is -500mv～500mv,And the voltage range that the master chip in main control unit 711 can read is in -500mv～657mv.CauseThis, need to be grounded after the first positive input mouth is connected with two groups of rc circuit in parallel.Above-mentionedThe purpose that circuit connects is, as boosting unit 714, by this port " virtual earth ", so thatBoosting process is carried out to the potential difference of indicator electrode and reference electrode, so that in main control unit 711Master chip can read.
In addition, also including in described first discharge circuit and the second discharge circuit with power pack evenThe circuit connecing, because it belongs to common linking techniques, repeats no more.
Fig. 7 is the circuit theory diagrams of electric toothbrush, as shown in fig. 7, the automatically controlled system of electric toothbrushThe main control unit 711 being arranged on circuit main board 14 addressed before the main inclusion of system, and respectivelyThe pressure detecting part being connected with main control unit 711, the ph being sequentially connected as mentioned above visits712, amplifier unit 713 and boosting unit 714；Ph detection part, that is, as mentioned above according toThe inductance coil 719 of secondary connection and induced electricity inductance value digital quantizer 718；Drive part, that is,Interconnective electric-motor drive unit 720 and microseism motor 13 as mentioned above；On-off circuit 715.In addition, the power supply unit 722 also including being connected with main control unit 711, led array 716 withAnd communication unit 717.As shown in figure 11, the main control unit 711 in the present embodiment adopts modelChip for n51822 is realized.
As shown in figure 12, electric unit 722 includes the charging receiving circuit being sequentially connected, andConnected bleeder circuit and charging detecting circuit respectively.
The 7v voltage that described bleeder circuit is used for being received charging receiving circuit switchs to electric tooth3v voltage needed for brush inside and 5v voltage.Described charging detecting circuit is used for judging to chargeWhen receiving circuit is charged, export, to main control unit 711, the notification being charged,After main control unit 711 receives above- mentioned information, learn that electric toothbrush is charged, thus exportingInstruction controls closing institute functional, in case leak-stopping is electric.
As shown in figure 13, described charging receiving circuit includes the charging of model bq5105xbReceiver is realized.
As shown in figure 14, charging detecting circuit is connected with the output port of charging receiving circuit,When there being electric signal input, electric signal was entered to export after partial pressure to main control unit 711.
As shown in figure 15,5v bleeder circuit includes the chip realization of model apw7137；As shown in figure 16,3v bleeder circuit includes the chip realization of model tps7xx series.
As shown in figure 17, communication unit 717 adopts Bluetooth technology, by above-mentioned detected brushAfter tooth dynamics data and/or oral cavity soda acid degrees of data carry out Bluetooth modulation, to the smart mobile phone of userTerminal exports, and checks in order to user.
In addition, also including memory cell (not shown), it is connected with described main control unit 711,For storing brush dynamics data and the oral cavity soda acid degrees of data that main control unit 711 is received.
Describe to electric toothbrush described in the utility model with reference to said structure and circuit theoryOperation principle easily described.
When being brushed teeth using electric toothbrush, user presses the start button on housing 11 surface firstSo that microseism motor 13 is started, be then applied to 2 one pressure of brush again, this pressure will controlThe brush bristle dynamics of the contact with user's dental surface.Aforementioned pressure cause brush 2 upwards/Move down, lower metal framework 131b up/down certainly will be made to move according to lever drive principle,The movement of this lower metal framework 131b makes it change the distance between with inductance coil, entersAnd different induction value is produced on inductance coil 719.Aforementioned different induction value passes through inductive sensorValue digital quantizer 718 identification changes into the receptible signal of main control unit 711 and by this signalSend to main control unit 711.Main control unit 711 is analyzed to aforementioned signal judging, if brush2 pressures are improper to remind user's adjustment brush dynamics.Alerting pattern may include languageSound or light flash etc., corresponding also include loudspeaker or LED lamp group, specifically no longer superfluousState.
Using electric toothbrush ph detection part detect intraoral acid-base value when, user toFront pull switch button 116, then ph probe 712 be rotated up opening；When ph probe 712When fully opening, supporting tactile in a pair of contact 115b and sealing block 122 of ph probe 712Point electrically connects, then ph probe 712 is formed with circuit main board 14 and electrically connects.Meanwhile, it is fixed onThe magnet of shift knob 116 bottom is misplaced with Hall switch, then Hall switch will be to electronicThe main control unit 711 of toothbrush sends one and starts corresponding electric signal with ph probe 712.The information that detected of ph probe 712 pass sequentially through amplifier unit 713 and boosting unit 714Analyzing and processing is eventually sent on main control unit 711, and main control unit 711 is carried out to this information pointAnalysis simultaneously provides related guidance according to this information to the MC of user.In addition, main control unit711 are additionally operable to control communication unit 717 wirelessly to export the data of described detection to the intelligence of userCan terminal.
The foregoing is only preferred embodiment of the present utility model, not new in order to limit this practicalityType, all within spirit of the present utility model and principle, any modification of being made, equivalent,Improve etc., should be included within protection domain of the present utility model.
For example, in the above-described embodiments, brush for electric toothbrush is under microseism motor 13 drivingTo be operated by vibration, as oscillating mode electric toothbrush, but to be not limited to this, electricityDynamic toothbrush can be also rotation electric toothbrush, and that is, brush to be operated by rotating.
Again for example, in the above-described embodiments, sensor is the inductance sensor including inductance coil,But be not limited to this, described sensor can also be pressure sensor/electrical distance sensor/away fromFrom one of sensor etc..